Discussion

Can not answer question if there is hidden content on the Internet, yet!

Popular press claims:
Images on eBay, Amazon and "pornographic bulletin boards" contain hidden messages:
Investigated eBay and USENET so far.

Future work:
Get images from different sources:
e.g. Alexa's wayback machine: Look at eBay from a year ago.
Refine stegdetect to be more accurate.
Find more clients to run stegbreak on.